单项选择题

Paul doesn't have to be made ______ . He always works hard.

A．learn
B．to learn
C．learned
D．learning
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单项选择题
You will be late ______ you leave immediately.
A．unless
B．until
C．if
D．or
单项选择题
The library needs ______ , but it'll have to wait until Sunday.
A．cleaning
B．be cleaned
C．clean
D．being cleaned
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